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    Long wireless local area network (WLAN) packets with midambles
    42.
    发明授权
    Long wireless local area network (WLAN) packets with midambles 有权
    长时间的无线局域网（WLAN）数据包

    公开(公告)号：US09351333B1

    公开(公告)日：2016-05-24

    申请号：US13689244

    申请日：2012-11-29

    Applicant: MARVELL INTERNATIONAL LTD.

    Inventor： Hongyuan Zhang ,  Rohit U. Nabar ,  Sudhir Srinivasa ,  Raja Banerjea ,  Yong Liu

    IPC: H04W84/12 ,  H04L12/28

    CPC classification number: H04W84/12 ,  H04L5/0007 ,  H04L5/0053 ,  H04L27/2602 ,  H04L27/261 ,  H04W28/065

    Abstract: A preamble, a plurality of data segments of a data payload of a single data unit, and one or more midambles, each included between respective data segments, are generated. Data to be included in the data segments is processed, including at least one of: encoding all data payload bits of all segments as a whole, encoding data payload bits on a per segment basis, scrambling all data payload bits of all segments as a whole, scrambling data payload bits on a per segment basis, adding padding bits to only a last data segment, or adding padding bits to each data segment separately. The single data unit, including the preamble, the plurality of data segments and the one or more midambles, is caused to be transmitted. A network interface of a communication device may perform the generation and the data processing, and may cause the transmission of the single data unit.

    Abstract translation: 产生前导码，单个数据单元的数据有效载荷的多个数据段，以及各个数据段之间的一个或多个中间码块。 包括在数据段中的数据被处理，包括以下至少之一：整体地编码所有段的所有数据有效载荷比特，对每个段进行编码数据有效负载比特，将整个段的所有数据有效载荷位加扰 ，在每个片段的基础上加扰数据有效载荷比特，将填充比特添加到最后一个数据段，或者分别向每个数据段添加填充比特。 导致包括前导码，多个数据段和一个或多个中间码的单个数据单元被发送。 通信设备的网络接口可以执行生成和数据处理，并且可以导致单个数据单元的传输。

    Simultaneous uplink transmission in a wireless network
    43.
    发明授权
    Simultaneous uplink transmission in a wireless network 有权
    在无线网络中同时进行上行链路传输

    公开(公告)号：US09237538B1

    公开(公告)日：2016-01-12

    申请号：US14065175

    申请日：2013-10-28

    Applicant: MARVELL INTERNATIONAL LTD.

    Inventor： Hongyuan Zhang ,  Rohit U. Nabar ,  Sudhir Srinivasa

    IPC: H04W4/00 ,  H04W56/00 ,  H04L29/10 ,  H04L5/00 ,  H04L27/26

    CPC classification number: H04W56/0005 ,  H04B7/0413 ,  H04L1/0004 ,  H04L5/0048 ,  H04L5/0053 ,  H04L27/261 ,  H04L29/10 ,  H04W28/18 ,  H04W72/1278 ,  H04W72/1289 ,  H04W84/12

    Abstract: A synchronization data unit is generated by an access point. The synchronization data unit (i) is for scheduling subsequent simultaneous transmission of a plurality of data units by communication devices, and (ii) specifies respective sets of spatial streams that respective communication devices are to use when transmitting respective data units. A signal is received via a plurality of antennas of the access point, where the signal corresponds to the plurality of data units transmitted simultaneously from the respective communication devices via the respective sets of sets of spatial streams. An estimate of the MIMO communication channel is determined using a plurality of training fields included in a first portion of the signal, and data in a second portion of the signal is decoded using the estimate of the MIMO communication channel.

    Abstract translation: 接入点产生同步数据单元。 同步数据单元（i）用于通过通信设备调度后续的多个数据单元的同时发送，并且（ii）指定各个通信设备在发送各个数据单元时要使用的各组空间流。 经由接入点的多个天线接收信号，其中该信号对应于通过相应的一组空间流从各个通信设备同时发送的多个数据单元。 使用包括在信号的第一部分中的多个训练场来确定MIMO通信信道的估计，并且使用MIMO通信信道的估计来对信号的第二部分中的数据进行解码。

    Narrow-band OFDM mode for WLAN
    44.
    发明授权
    Narrow-band OFDM mode for WLAN 有权
    用于WLAN的窄带OFDM模式

    公开(公告)号：US08917795B1

    公开(公告)日：2014-12-23

    申请号：US13769134

    申请日：2013-02-15

    Applicant: Marvell International Ltd.

    Inventor： Hongyuan Zhang ,  Sudhir Srinivasa ,  Rohit U. Nabar ,  Raja Banerjea

    IPC: H04L27/00 ,  H04L27/26

    CPC classification number: H04L27/2627 ,  H04J3/0697 ,  H04L27/2626 ,  H04L27/2657 ,  H04L27/2675

    Abstract: Systems and techniques relating to wireless communications are described. A described system includes circuitry configured to generate, in accordance with a clock signal, a first baseband signal for transmission over a wireless channel, one or more first preamble symbols of the first baseband signal are based on a pre-determined preamble sequence when a first clock frequency is used in the clock signal. The described system includes circuitry configured to generate, in accordance with the clock signal, a second baseband signal for transmission over the wireless channel, one or more second preamble symbols of the second baseband signal are based on the pre-determined preamble sequence, the one or more second preamble symbols have a longer duration than the one or more first preamble symbols when a second clock frequency is used in the clock signal. The second clock frequency is lower than the first clock frequency and is used to extend a wireless communication range of the wireless channel.

    Abstract translation: 描述与无线通信相关的系统和技术。 所描述的系统包括经配置以根据时钟信号产生用于通过无线信道传输的第一基带信号的电路，当第一基带信号的第一 在时钟信号中使用时钟频率。 所描述的系统包括被配置为根据时钟信号产生用于通过无线信道传输的第二基带信号的电路，第二基带信号的一个或多个第二前导码符号基于预定的前导码序列，一个 或更多的第二前导码符号在时钟信号中使用第二时钟频率时具有比一个或多个第一前导码符号更长的持续时间。 第二时钟频率低于第一时钟频率，并用于扩展无线信道的无线通信范围。

    Midamble for WLAN PHY packets
    46.
    发明授权
    Midamble for WLAN PHY packets 有权

    公开(公告)号：US11006480B1

    公开(公告)日：2021-05-11

    申请号：US16525420

    申请日：2019-07-29

    Applicant: Marvell International Ltd.

    Inventor： Hongyuan Zhang ,  Rohit U. Nabar ,  Sudhir Srinivasa ,  Raja Banerjea ,  Yong Liu

    IPC: H04W84/12 ,  H04L27/26 ,  H04J11/00 ,  H04K1/00

    Abstract: A communication device generates a physical layer (PHY) data unit that includes a PHY preamble and one or more PHY midambles. The communication generates the PHY preamble of the PHY data unit to include i) a signal field having a subfield that indicates that the PHY data unit includes one or more PHY midambles, ii) a short training field (STF) for automatic gain control (AGC) training and synchronization at a receiver, and iii) one or more long training fields (LTFs) for determining a channel estimate at the receiver. The communication generates a data payload of the PHY data unit having i) a set of orthogonal frequency division multiplexing (OFDM) symbols, and ii) one or more PHY midambles. Each of the one or more PHY midambles includes one or more LTFs for determining an updated channel estimate. The communication device transmits the PHY data unit via a wireless communication channel.

    Methods and apparatus for fine timing measurement with frequency domain processing
    47.
    发明授权
    Methods and apparatus for fine timing measurement with frequency domain processing 有权

    公开(公告)号：US10158443B1

    公开(公告)日：2018-12-18

    申请号：US15690198

    申请日：2017-08-29

    Applicant: Marvell International Ltd.

    Inventor： Christian R. Berger ,  Niranjan Grandhe ,  Sudhir Srinivasa

    IPC: H04L7/00 ,  H04J3/06 ,  G04F10/00 ,  H04W56/00

    Abstract: The present disclosure describes methods and apparatuses for fine timing measurement with frequency domain processing. In some aspects, a first device receives a frame that is transmitted by a second device via a wireless medium. A degree to which the frame is affected by multipath propagation in the wireless medium is determined based on frequency power and linear phase of the frame, which can be calculated using frequency domain processing. Based on the degree to which the frame is affected, a time of arrival calculation for the frame can be compensated for effects related to the multipath propagation. By so doing, the effects of multipath propagation can be addressed without time domain processing, which is typically complex and more expensive to implement.

    Integer non-uniform constellation for high-order QAM
    49.
    发明授权
    Integer non-uniform constellation for high-order QAM 有权

    公开(公告)号：US09967127B1

    公开(公告)日：2018-05-08

    申请号：US15486154

    申请日：2017-04-12

    Applicant: Marvell International Ltd.

    Inventor： Yakun Sun ,  Hongyuan Zhang ,  Yan Zhang ,  Sudhir Srinivasa

    IPC: H04L27/36 ,  H04L27/34

    CPC classification number: H04L27/362 ,  H04L27/34 ,  H04L27/3405

    Abstract: The present disclosure includes systems and techniques relating to an integer non-uniform constellation (NUC) high-order M-QAM. In some implementations, a scale factor is identified for a mapping of bit patterns into M constellation points of a NUC M-QAM, wherein M is no less than 1024; each of the M constellation points has respective real and imaginary coordinates; and the respective real and imaginary coordinates having respective decimal parts that are integer multiples of 2−n, with n being a non-negative integer less than 5. A bit pattern is received and mapped to integer real and imaginary coordinates of one of the M constellation points according to a mapping rule of the NUC M-QAM. The integer real and imaginary coordinates of the one of the M constellation points equal the scale factor multiplied with respective real and imaginary coordinates of the one of the M constellation points having respective decimal parts.

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